Container bottom and top spinning head



July 29, 1941.

' J. K. M. HARRISON CONTAINER BOTTUM AND TOP SPINNING HEAD Filed Marh 22, 1939 Jax@ JlL

ATTORNEYS.

` Patented. July 2 9, .e

UNITED sTATEs- PATENT orrlcE CONTAINER no'rrom Aan -Tor SPINNING naso John K.. M.- Harrison. Ogontz, Pa.

Application Msi-oh zz, laas,- sorisi No. 263,349 j (ci. ca -36.5)

This invention has reference broadly to means operative to spin over the ends of containers, after suitableend closures have been inserted therein, into overlapping relation with the confronting inner surface of. the container body shell, as well as to rigidly buttress-seal the surrounding free endsI in contact with the respective end closures against outward displacement.

More particularly, the present improvements aim to provide a novel construction of container end spinning head whereby the retroverted portion of container body shell ends is not only moreevenly distributed and uniformly forced into mutual union with the confronting vinner surface oi' said body shell, but the operation as a whole is enectively accomplished in less time than hitherto.

Another aim of this invention is to attain -the stated object of the preceding paragraph under the actionpf irradiant heat with a minimum of frictional resistivity to its easy accomplishment and. at the same time, to expandingly roll the body shell retroversion lradially outwards into `mutual union'with 'the confronting bodyy shell surface. as well as longitudinally-inwards' to sealing juncture with the container end closure surrounding edgeportion.l

Further objects and ancillary advantages of this invention will appear from the following dlsclosure of preferred embodiments when considered in commotion with the accompanying sheet of drawings: while it is to be understood.

the concluding claims are to be accorded a range ofequivalents consistent with the state of the prior art.

' In the drawing:

ame distinguishing exponents and additional indicia to better designate the differentiating feavided at diametrically opposedvpoints with sub- Fig. I is a view partly in elevation and partly Y in-axialsection of one practical embodiment of this invention, with one end portion of a container therein.

Fig. II is an underside plan view of the same, with the container of Fig. I.

in section on the plane II-II Fig. III is a fragmentary section of a structural detail, hereinafter vfully explained, but drawn to a larger scale.

Fig. IV is a similar view to the preceding, showing a roller construction hereinafter more fully explained.

Fig. Vis a fragmentary view of a modified form .of the invention; and,

Fig. VI is a similar view of a further modication. o In all the views, corresponding reference characters are applied to similar parts, but with ferential ridge for contacting the outer surface'of Il, for example, and

tures. In the respective illustrations, there are shown typical rotary heads for spinning and sealing a .closure 8, Fig. I, into, the open end of a container body shell 1. More specifically,- the illustrated embodiments of this invention are designed,

preferably, for the sealing-in of pre-inserted end closures into suitably lined body shells under the action of irradiant heat with concurrent inward retroverslon of the body shell ends into mutual juncture, as well as the bonding-buttress union of the inturned portion against the outer peripheral edge of said closures.'

In Figs. I and II, the spinning head is comprehensively designated 8, the same including a Ibody portion 9, with a tubular attaching ysection said body portion is formed toprovide an interior coaxial boss l'l with a surrounding annular recess l2 havingy a ilaring entrant' portiony I 3. The boss ll is preferably prostantially circular cut-outs ll, axially of each of which is rigidly secured anat-head, shouldered screw-stud, ail'ording free rotary support for a `ball-bearing roller it of o thickness slightly less' than the depth of the housing I4 so as not to project beyond the face of theV boss II. It is to be-observed, more particularly from Fig. II, that the respective studs l5 rigidly secure the inner `I9 of the body shell 1 into impingingengagement -with said b ody shell.

Mounted in an appropriate manner on the head 8 is an electric disc heater 20 whereby irradiant heating of thebody portion 9 is effected in an obvious' manner; while the outer face of the boss ll Ais yslightly dished at 2| to provide a circumthe closure 8.

In use, and assuming the spinning head 8 to be rotated by any suitable means, 'such forexample as disclosed Vin my prior application for a patent head 8'.'

portion of the roller 28 projects very slightly in on'machines for making, filling and sealing containers lined with a thermoplastic, filed October 11, 1937, under Serial No. 168,345, and whichl has matured into United States VPatent No. 2,180,954, dated November 21, 1939, and that a preformed body shell I with a fully inserted end closure 6 is brought into registration with said by irradiant heat from the disc 20. It will, likewise, be clear that when the body shell 1 free edge contacts the recess return bend edge I8, it will be inwardly turned with the retroversion I9 surroundingly spun into mutual union with the confronting body-shell coated wall. Furthermore, as the intially retroverted portion I9, or its leading edge, impinges the upper rounded edge portion I 'I of the rollers I6, as viewed in the drawing, it will be outwardly expanded and forcibly compressed, until said leading end passes below the lower edges I1 of said rollers and into circumferential abutment with the confronting circumferential portion of the end closure 6, whereby a uniform and bonding-juncture between the stated parts is positively effected.

Referring to Fig. V, all parts previously described are correspondingly designated by the same reference character with a single prime exponent, and it is to be noted the only diier- 26 employed may be varied in number and to meet diii'erent service conditions of the spinning heads 8. In practice it has been found that a pair of diametrically opposed ball-bearing rollers I6 alone are extremely efficient for the spinning of paper, fiber and analogous material container body shell ends. It will also be readily understood that the grooved rollers 22.and auxiliaryv rollers 26, while expediting the spinningsealing operation, are highly advantageous when' treating heavier material containers, as well as those fabricated from sheet metal.

From the foregoing disclosure it will be appreciated the invention fully justifies the stated objects had in view, and while specific embodiments have been particularly described, the following claims are to be accorded such reasonable range of equivalents as their interpretative scope,

entiating feature consists in substituting for the return bend freely rotative ball bearing groovedrollers 22. In order to Journal the rollers 22, the recess I2' is extended at 23 in the region of each roller I8', and a hole 24 is bored radially through the head body 9' into the boss II' for insertion of a suitable axis pin 25 on which the associated roller 22 freely rotates; or contrariwise said roller may be secured to the axis pin 25 and the latter revolvein the boring 2l. In practice, the grooveA of each roller 22 is, preferably, slightly inset at one side to provide the return bend I8' and outwardly flared at I8", and respectively function to facilitate rounding of the container body shell contacting edge incidental to commencement of the spinning operation and Afor initial smooth guidance of said edge and the prior art, will permit.

Having thus described my invention, I claim: i

1. A rotary head for spinning the free edges of container body shells .having pre-inserted closures, comprising a body portion with an attaching section, said body portion including an interior coaxial boss defining an annular recess having a flaring entrant part and a return bend remote therefrom, circumferentially spaced 'substantially-cireular cut-outs in said boss, and outwardly-active freely revolvable ball-bearing rollers in said cut-outsof a depth less than that of the cut-outs and with slight circumferential projection into the recess for rmly compressing the container retroverted end into mutual union with the confronting body shell wall as well'as the peripheral outer surface of the adjoining closure.

2. A rotary spinning head as defined in claimy 1, wherein headed screw studs secure-the inner races of the ball-bearing rollers in place while the outer races have slight projection beyond the circumferential wall oi' the head boss.

3. A rotary spinning head as defined in claim 1, further characterized by glOOved ball-bearing outwardly-active compressing rollers.

into the roller groove 22,v all of which will be wards of the recess I 21,., yg1he4its lower portion is conically truncated at 3l to coincide with the head flaring I3. the rollers Ii' to facilitate free entry of the container body shell 1 into the recess I2', as well as vto materially reduceA frictional binding between said'body shell and the head during the spinning operation.

Obviously the number oirollers It, 22 and 4.. A rotary spinning head as defined in claim 1, further. characterized by oircumferentially- A-spaced ball-bearing rollers journaled in conformative pockets in the recess outer wall,'each said roller embodying a truste-conical part for planar coaction-with the recess entrant ilareand the other part cylindrical for opposing coaction with one of the rollers inthe body portion coaxial lboss for the joint compression of the body shell retroversion.

These rollers 28 coact withoutward projection of the container body` shell free' edge.

JOHN K. M. HARRISON. 

